Guard Dog vs Shield Security – Smart Bot Blocking, Brute-Force Login Protection & File Scanning

Guard Dog is a focused WordPress security plugin for the login door, authentication, sessions, and practical access workflows. With custom login URLs, two-factor authentication, passkeys, CAPTCHA providers, access control, and activity logging, Guard Dog helps site owners tighten the parts of WordPress that get bothered most. Key Features: Custom Login URLs – Hide your wp-admin and wp-login.php from attackers Two-Factor Authentication (2FA) – TOTP-based authentication with recovery codes Social Login (OAuth) – Sign in with Google, Microsoft, or Apple Passkeys – Use device-based biometric authentication like Face ID, Touch ID or Windows Hello Multiple CAPTCHA Providers – Support for Google reCAPTCHA v2/v3, hCaptcha, and Cloudflare Turnstile Login Attempt Limiting – Prevent brute-force attacks with intelligent lockout Access Control – IP-based whitelist/blacklist protection Activity Monitoring – Comprehensive logging of security events Temporary User Access – Create temporary WordPress users with time-limited, secure access Frontend Account Security – Shortcodes and blocks for login, passkeys, 2FA, and session controls Why Choose Guard Dog? Privacy-Focused – Multiple CAPTCHA options including privacy-first providers WordPress.org Compliant – Built following WordPress coding standards Site-Owned Controls – Protections run inside your WordPress site User-Friendly – Intuitive interface with helpful documentation Regular Updates – Actively maintained and updated Perfect For: Business websites requiring enhanced security WordPress sites handling sensitive data Multi-user sites with complex access requirements Anyone wanting practical login and account protection without a central SaaS dependency Frontend Shortcodes: [guard_dog_login_form] renders a public Guard Dog-managed login form [guard_dog_passkey_login] renders a standalone passkey sign-in button for custom login pages [guard_dog_two_factor] renders logged-in 2FA management [guard_dog_passkeys] renders logged-in passkey management [guard_dog_sessions] renders logged-in active-session management [guard_dog_account_security] renders the composite logged-in account security widget for 2FA, passkeys, and sessions [guard_dog_2fa] remains supported as the legacy alias for the account security widget Block-based themes can use the matching Guard Dog Login Form, Passkey Login, Two-Factor Auth, Passkeys, Sessions, and Account Security blocks. Additional Information Support: For support questions, please use the WordPress.org support forums. Privacy: Guard Dog respects user privacy and offers multiple privacy-focused options. Third-party services are only contacted when you enable features that need them, such as CAPTCHA, email delivery, social login, IP reputation, or geolocation. Security: Guard Dog follows WordPress security best practices. User input is sanitized and output is escaped throughout the plugin. Third-Party Services Guard Dog integrates with the following third-party services to provide CAPTCHA protection. These services are optional and only used when CAPTCHA features are enabled. Google reCAPTCHA (v2 and v3) What it is: Google’s CAPTCHA service that helps protect websites from spam and abuse. What it’s used for: – Verifying that login, registration, and password reset attempts are made by humans – Preventing automated bot attacks on your WordPress forms What data is sent and when: – User interaction data (mouse movements, time spent on page) when CAPTCHA is solved – IP address of the user – Site domain for verification – CAPTCHA response token Privacy and Terms: – Google reCAPTCHA Privacy Policy – Google reCAPTCHA Terms of Service – Google reCAPTCHA Data Usage Cloudflare Turnstile What it is: Cloudflare’s privacy-first CAPTCHA alternative that doesn’t require user interaction. What it’s used for: – Invisible verification of human users during login, registration, and password reset – Privacy-focused protection without tracking or cookies What data is sent and when: – Non-interactive browser signals when forms are submitted – IP address for verification – Site domain for validation Privacy and Terms: – Cloudflare Privacy Policy – Cloudflare Terms of Service – Turnstile Documentation hCaptcha What it is: A privacy-focused CAPTCHA service that doesn’t track users across websites. What it’s used for: – Human verification during login, registration, and password reset forms – Privacy-conscious alternative to Google reCAPTCHA What data is sent and when: – User interaction with CAPTCHA challenge – IP address for verification – Site domain for validation Privacy and Terms: – hCaptcha Privacy Policy – hCaptcha Terms of Service – hCaptcha Data Processing Google OAuth (Social Login) What it is: Google’s OAuth 2.0 service that allows users to sign in using their Google account. What it’s used for: – Authenticating WordPress users via their Google account – Retrieving basic profile information (name, email) to link or create accounts What data is sent and when: – User is redirected to Google’s authorization server when clicking “Sign in with Google” – An authorization code is exchanged for an access token on your server – Basic profile information (name, email, Google user ID) is retrieved from Google’s API – No ongoing data sharing – data is only retrieved during the login process Privacy and Terms: – Google OAuth Privacy Policy – Google OAuth Terms of Service – Google API Services User Data Policy Microsoft Azure AD (Social Login) What it is: Microsoft’s OAuth 2.0 service via Azure Active Directory that allows users to sign in using their Microsoft account. What it’s used for: – Authenticating WordPress users via their personal Microsoft account or organizational (work/school) account – Retrieving basic profile information (name, email) to link or create accounts What data is sent and when: – User is redirected to Microsoft’s authorization server when clicking “Sign in with Microsoft” – An authorization code is exchanged for an access token and ID token (JWT) on your server – Basic profile information (name, email, Azure object ID) is extracted from the ID token – No ongoing data sharing – data is only retrieved during the login process Privacy and Terms: – Microsoft Privacy Statement – Microsoft Services Agreement – Microsoft Identity Platform Documentation Apple Sign In (Social Login) What it is: Apple’s OAuth 2.0 / OpenID Connect service that allows users to sign in using their Apple ID. What it’s used for: – Authenticating WordPress users via their Apple ID – Retrieving basic profile information (name, email) to link or create accounts What data is sent and when: – User is redirected to Apple’s authorization server when clicking “Sign in with Apple” – An authorization code is exchanged for an access token and ID token (JWT) on your server – Basic profile information (email, user ID) is extracted from the ID token – User’s name is only provided on first authorization; subsequent logins return only the user ID – Apple may provide a private relay email address instead of the user’s real email – No ongoing data sharing – data is only retrieved during the login process Privacy and Terms: – Apple Privacy Policy – Sign in with Apple Guidelines – Apple Developer Program License Agreement TOTP (Time-based One-Time Password) Standard What it is: An open standard (RFC 6238) for generating time-based one-time passwords used in two-factor authentication. What it’s used for: – Generating secure, time-limited authentication codes for 2FA – Providing backup authentication when primary 2FA methods are unavailable – Enabling compatibility with popular authenticator apps (Google Authenticator, Authy, Microsoft Authenticator, etc.) What data is sent and when: – No external data transmission – TOTP codes are generated locally using the TOTP algorithm – Secret key generation – A unique secret key is generated locally when 2FA is enabled for a user – QR code generation – QR codes are generated locally for easy setup with authenticator apps – Code verification – Generated codes are verified locally against the stored secret key Privacy and Terms: – RFC 6238 – TOTP Standard – Google Authenticator Privacy Policy (if using Google Authenticator app) – Authy Privacy Policy (if using Authy app) – Microsoft Authenticator Privacy Policy (if using Microsoft Authenticator app) Data Handling Summary When CAPTCHA is disabled: No data is sent to any third-party services. When CAPTCHA is enabled: Only the specific provider you choose receives verification data. Data is not shared between providers or stored by Guard Dog beyond the verification process. When 2FA is disabled: No external data transmission occurs. When 2FA is enabled: – All TOTP operations (code generation, verification) happen locally on your server – No data is transmitted to external services for 2FA functionality – Authenticator apps only receive the initial setup QR code or secret key – Recovery codes are generated locally and stored securely When Social Login is disabled: No data is sent to any OAuth provider. When Social Login is enabled: – Data is only sent to the configured providers (Google, Microsoft, Apple) during the login process – Only basic profile information (name, email, user ID) is retrieved – Social account links are stored locally in your WordPress database – Users can unlink their social accounts from their profile at any time User control: Users can choose which CAPTCHA provider to use, or disable CAPTCHA entirely. 2FA can be enabled/disabled per user, and users can choose their preferred authenticator app. Social login can be enabled/disabled by administrators, and users can manage their linked social accounts. All security features are optional and configurable.

Most security plugins hand you a dashboard full of alerts and expect you to know what to do next. Shield works differently. It blocks threats automatically, repairs what it can on its own, and then shows you exactly what still needs your attention — ranked by impact, not volume. Less noise. More action. 🤖 Security That Runs Itself The most powerful thing Shield does is what it handles without you: Automatic IP Blocking — every visitor is quietly scored as they interact with your site. Failed logins, firewall blocks, silentCAPTCHA failures, and other signals accumulate into a reputation score. When a visitor’s score crosses the threshold, Shield blocks them — automatically, without you lifting a finger Automatic File Repair — when a file integrity scan finds a changed WordPress core file, Shield pulls the original from WordPress.org and restores it. Detected and fixed, without waiting for you to act Automatic Bot Recognition — Shield identifies legitimate crawlers (Google, Bing, DuckDuckGo, Yandex, Apple) and known services (ManageWP, Pingdom, Stripe, CloudFlare) and never blocks them. Your SEO and monitoring tools keep working 🧭 Guided Security, Not Just a Dashboard Shield organises your security into four focused areas so you always know where to look: Queue — things that need your attention, ranked by priority. Not everything at once — just what matters right now Investigate — dig into blocked IPs, security events, and the specific signals that triggered each one Configure — guided setup for each protection area, with clear recommendations matched to your site Reports — a clear view of what Shield has blocked, detected, and repaired over time The goal: guide you quickly towards action, not bury you in data. 🛡️ Free Protection Bot Blocking & Firewall silentCAPTCHA — blocks bad bots on login, registration, lost password, and comment forms using passive signals invisible to real visitors. No CAPTCHA keys. No external requests. No JavaScript that breaks your forms. Everything runs on your server (GDPR friendly). Firewall rules blocking common WordPress attack patterns — SQL injection probes, known exploit signatures, suspicious request parameters XML-RPC protection — disable or restrict entirely, including pingbacks and trackbacks REST API firewall — block unauthenticated requests Fake crawler detection — identifies bots spoofing legitimate search engines Login & Account Security Two-factor authentication (2FA) — email codes, Google Authenticator, or YubiKey OTP for all users Brute force protection with configurable login attempt limits and cooldown Session locking — tie sessions to a browser or IP to stop account theft after a successful login User enumeration blocking — closes off ?author= probes used to harvest usernames before an attack Scanning & Integrity Core file scanning — compares WordPress core against official checksums and repairs changed files automatically Suspicious PHP detection — flags PHP files in locations where they have no business being Abandoned plugin detection — identifies unmaintained plugins most likely to carry unpatched vulnerabilities Visibility & Control Security Admin PIN — lock Shield’s own settings so other administrators cannot quietly weaken your configuration Security activity log — logins, user changes, plugin and theme events, post edits, and suspicious requests: Everything in one clear view IP Rules — automatic & manual block and bypass rules, CIDR range support, full per-IP request history 🤝 CrowdSec Integration Shield is the only WordPress security plugin with a native CrowdSec integration. CrowdSec aggregates threat signals from millions of sites into a shared IP reputation network — your site blocks known attackers before they ever probe you, using intelligence far beyond your own traffic history. ✨ ShieldPRO Passkeys — phishing-resistant, passwordless login for users Backup login codes — emergency 2FA access when a device is lost AI-based malware scanner — detects known and unknown PHP malware Plugin & theme file scanning — compares installed files against WordPress.org originals, flagging unauthorised changes Vulnerability scanning — active checks across all installed plugins and themes Broader spam protection — WooCommerce, EDD, Contact Form 7, Ninja Forms, Elementor, and more Traffic rate limiting — cap request rates per IP to absorb high-volume bot floods User suspension — manual or automatic suspension of idle accounts MainWP integration White Label — rename and rebrand Shield for client sites Who It’s For Shield suits site owners, agencies, and MSPs who want protection that runs itself — not a plugin that demands constant attention to be useful. If you have been burned by security plugins that generate more noise than protection, or dashboards that tell you everything is wrong without telling you what to fix, Shield was built to be the alternative.